The original definition of Bias Circulate had the Trailers make a
R-H (or L-H) Star, Turn it 1/2 way, and adjust to end in Waves.
Hence, it was possible for the caller to modify the amount to turn the
Star (this is considered bogus today). Our definition
uses Diagonal Box Circulate as a convenient way to
express turning the Star. It is inappropriate to call
Bias Circulate from T-Bones such that the Trailers are in Columns
instead of Lines.